Ownable set to 0 address

[abcoathup]

Hi @RRomjon,

Welcome to the community

To use OpenZeppelin Contracts with upgrades with multiple inheritance we can call the __{ContractName}_init_unchained functions. See documentation: https://docs.openzeppelin.com/contracts/4.x/upgradeable

See the example in this forum post:

Which package to use for upgradable and ownable contracts?

Hi @dappCoder, Welcome to the community We should use OpenZeppelin Contracts Upgradeable (OpenZeppelin Contracts Ethereum Package was the previous OpenZeppelin Contracts upgradeable version). See the documentation for how to use: https://docs.openzeppelin.com/contracts/3.x/upgradeable#multiple-inheritance If you need an example, you can check out the ERC721 preset: Your contract could look something like the following: // contracts/MyContract.sol // SPDX-License-Identifier: MIT p…